The Missouri Compromise succeeded in blocking slavery in all new states formed from the Louisiana territory.
legalizing slavery in all territory north of the 36°30' line of latitude.
eliminating the basic differences between the North and the South.
preserving the balance between slave and free states for several years.

preserving the balance between slave and free states for several years.

Explanation:

blocking slavery in all new states formed from the Louisiana territory: split free and slave states by the 36 30' line

legalizing slavery in all territory north of the 36°30' line of latitude.: its flipped, anything north of that is a free state

eliminating the basic differences between the North and the South.: not exactly, slavery was still an argument between the two

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."